attachment-6.ashx

attachment-6.ashx - Handout for CHAPTER 27 Community...

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Quick reminder of where communities fall out in our levels of organization What is community ecology (and our focus)? Focus is on interaction btwn different species within a community (biotic part of an ecosystem) -There is an evolutionary component to ecology 2 categories: -Direct interactions (our focus) -Indirect interactions (can be complex) Interactions between species 1- Direct: One species had an immediate and direct impact on another species. Ladybugs eat aphids - as the number of ladybugs increases, the number of aphids decreases. Aphids eat and damage roses - as the number of aphids does up, the number of rose bushes goes down. 2 – indirect interactions One species affects another species, but viw effects on another species. Decrease in the number of ladybugs= decrease in the number of rosebushes because the number of aphids goes up. Demonstrates interconnectivity (web) among species in a community. 1
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attachment-6.ashx - Handout for CHAPTER 27 Community...

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